CHEHALIS TRIBAL HOUSING
PWS ID: 105300027 · OAKVILLE, 10 98568
Population Served
620
Total Violations
299
Health-Based Violations
1
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Native American
- Connections
- 114
- School/Daycare
- No
- MCL Violations
- 0
- Monitoring Violations
- 279
- Treatment Tech Violations
- 1
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 36 | 2013 |
| Chlorine | MR | 25 | 2025 |
| Gross Alpha, Excl. Radon and U | MR | 17 | 2017 |
| Combined Uranium | MR | 16 | 2017 |
| Combined Radium (-226 and -228) | MR | 16 | 2017 |
| Nitrate | MR | 14 | 2024 |
| Consumer Confidence Rule | Other | 14 | 2017 |
| Total Polychlorinated Biphenyls (PCB) | MR | 5 | 2025 |
| TTHM | MR | 5 | 2023 |
| Total Haloacetic Acids (HAA5) | MR | 5 | 2023 |
| Lead and Copper Rule | MR | 4 | 2020 |
| Revised Total Coliform Rule | RPT | 4 | 2025 |
| 2,3,7,8-TCDD | MR | 3 | 2025 |
| Hexachlorocyclopentadiene | MR | 3 | 2025 |
| Atrazine | MR | 3 | 2025 |
| Heptachlor | MR | 3 | 2025 |
| HEXACHLOROBENZENE | MR | 3 | 2025 |
| Benzo(a)pyrene | MR | 3 | 2025 |
| Chlordane | MR | 3 | 2025 |
| Simazine | MR | 3 | 2025 |
| Toxaphene | MR | 3 | 2025 |
| Di(2-ethylhexyl) adipate | MR | 3 | 2025 |
| Methoxychlor | MR | 3 | 2025 |
| Di(2-ethylhexyl) phthalate | MR | 3 | 2025 |
| Endrin | MR | 3 | 2025 |
| Arsenic | MR | 3 | 2005 |
| LASSO | MR | 3 | 2025 |
| Heptachlor epoxide | MR | 3 | 2025 |
| BHC-GAMMA | MR | 3 | 2025 |
| Pentachlorophenol | MR | 2 | 2011 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.